如何使用as3类访问舞台上的movieClip?

时间:2011-09-02 07:08:43

标签: actionscript-3 actionscript flash-cs3

public class MyClass extends MovieClip {
            public function MyClass():void {
                my_mc.addEventListener(MouseEvent.CLICK, action);
            }
            private function action(e:MouseEvent):void {
                trace("cliked");
            }
        }

时间轴代码

 var myClass:MyClass = new MyClass();
    addChild(myClass);

我无法访问my_mc(放置在FLA中)动画片段。我如何访问?

2 个答案:

答案 0 :(得分:7)

试试这个:

public class MyClass extends MovieClip
{
    public function MyClass()
    {
        if (stage) init();
        else addEventListener(Event.ADDED_TO_STAGE, init);

    }// end function

    private function init(e:Event = null):void 
    {
        removeEventListener(Event.ADDED_TO_STAGE, init);

        var myMc:MovieClip = stage.getChildByName("my_mc") as MovieClip;
        // var myMc:MovieClip = parent.getChildByName("my_mc") as MovieClip;

        myMc.addEventListener(MouseEvent.CLICK, onMyMcClick)

    }// end function

    private function onMyMcClick(e:MouseEvent)
    {
        trace("clicked");

    }// end function

}// end class

如果这不起作用(我认为不会这样),那是因为你的my_mc显示对象不是舞台的子节点,而是{{1}的实例的子节点}。如果是这样,那么只需在上面的代码中注释掉以下语句:

MainTimeline

并在上面的代码中取消注释以下语句:

var myMc:MovieClip = stage.getChildByName("my_mc") as MovieClip;

如果我的假设是正确的,// var myMc:MovieClip = parent.getChildByName("my_mc") as MovieClip; my_mc显示对象共享同一个父级。

答案 1 :(得分:0)

如果my_mc是MyClass舞台上的MovieClip,您可能会过早地尝试访问它。构造函数代码通常在绘制第一帧之前执行,因此您需要通过监听Event.ADDED_TO_STAGE来等待该绘图:

public class MyClass extends MovieClip {
    public function MyClass():void {
        if(stage) {
            init();
        } else {
            addEventListener(Event.ADDED_TO_STAGE,init);
        }
    }

    private function init(e:Event = null):void {
        if(e) removeEventListener(Event.ADDED_TO_STAGE,init);
        stage.my_mc.addEventListener(MouseEvent.CLICK, action);
    }

    private function action(e:MouseEvent):void {
        trace("cliked");
    }
}